期刊
ICES JOURNAL OF MARINE SCIENCE
卷 65, 期 7, 页码 1198-1202出版社
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsn101
关键词
buoyancy; eggs; Gadus morhua; retention
资金
- Norwegian Research Council [155930/700]
There are significant genetic differences in coastal cod (Gadus morhua) along the Norwegian coast, and in order to maintain these differences, there must be mechanisms that ensure local retention of eggs and larvae in the spawning areas. The buoyancy of eggs from four different areas along the Norwegian coast was measured using a density gradient column, and the results from modelling experiments showed that in three of the groups (Tysfjord, Helgeland, and Oygarden), the buoyancy in combination with local hydrography would place the eggs in subsurface waters where retention is greater than in surface waters.
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